He may have been one of America's greatest architects, responsible for designing the Guggenheim Museum in New York and the Fallingwater home in Pennsylvania, but that didn't stop Frank Lloyd Wright responding to the humble requests of a young boy who asked him to draw plans for a doghouse.

In the mid-1950s Lloyd Wright sent 12-year-old Jim Berger a design for a dog house after Berger wrote to the designer to ask for a home for his black Labrador, Eddie.

"'I would appreciate it if you would design me a doghouse, which would be easy to build, but would go with our house," he wrote in a letter recently released. "[My dog] is two-and-a-half feet high and three feet long. The reasons I would like this doghouse is for the winters mainly."

Lloyd Wright obliged, sending over a set of intricate designs without charging a penny.

Writing to your idols is a common childhood pursuit, but do you have any unique memorabilia from one of your heroes? How did you come by it and what does it mean to you?